I've just sold my late fathers P3S and got myself a spark. The company I sold it to did not want the accessories. Where would be the best place to sell/ give away these. There's a hard shell rucksack, open lowepro drone guard (still boxed), loads of extra. Some have been used so would need to be given away others are new, that I'd like to get something back for. I'm in the UK any suggestions?